Anti-theft device



FIG. 1 is a perspective top view of an anti-theft device according to an embodiment of the present invention;

FIG. 2 is a perspective bottom view of the anti-theft device of FIG. 1;

FIG. 3 is a top view of the anti-theft device of FIG. 1;

FIG. 4 is a bottom view of the anti-theft device of FIG. 1; and,

FIG. 5 is a side view of the anti-theft device of FIG. 1. 

The ornamental design for an anti-theft device, as shown and described. 